package com.heima.wemedia.service.impl;

import cn.hutool.core.bean.BeanUtil;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDTO;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {

    @Autowired
    private WmNewsMapper wmNewsMapper;
    @Autowired
    private GreenTextScan greenTextScan;
    @Autowired
    private GreenImageScan greenImageScan;
    @Autowired
    private FileStorageService fileStorageService;
    @Autowired
    private IArticleClient articleClient;
    @Autowired
    private WmChannelMapper wmChannelMapper;
    @Autowired
    private WmUserMapper wmUserMapper;
    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;
    @Autowired
    private Tess4jClient tess4jClient;

    /**
     * 自媒体文章审核
     *
     * @param id 文章id
     */
    @Override
    @Async  //标明当前方法是一个异步方法
    public void autoScanWmNews(Integer id) {
        //1.查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        if(wmNews == null) {
            throw new RuntimeException("文章不存在");
        }

        if(wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())) {
            //从内容中提取纯文本内容和图片
            Map<String,Object> textAndImages = handleTextAndImages(wmNews);

            //自管理的敏感词过滤
            boolean isSensitiveScan = handleSensitiveScan((String) textAndImages.get("content"), wmNews);
            if(!isSensitiveScan) return;

            //2.审核文本内容 阿里云接口
            boolean isTextScan = handleTextScan((String) textAndImages.get("content"), wmNews);
            if(!isTextScan) return;//文章审核失败中断方法

            //3.审核图片 阿里云接口
            boolean isImagesScan = handleImagesScan((List<String>) textAndImages.get("images"), wmNews);
            if(!isImagesScan) return;

            //4.审核成功，保存app端的相关的文章数据
            ResponseResult responseResult = saveAppArticle(wmNews);
            if(!responseResult.getCode().equals(200)) {
                throw new RuntimeException("文章审核，保存app端相关文章数据失败");
            }
            // 回填article_id
            wmNews.setArticleId((Long) responseResult.getData());
            updateWmNews(wmNews, (short) 9, "审核成功");
        }
    }

    /**
     * 自管理的敏感词过滤
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {
        boolean flag = true;

        //获取所有的敏感词
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());

        //初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);

        //查看文章中是否包含敏感词
        Map<String,Integer> map = SensitiveWordUtil.matchWords(content);
        if(map.size() > 0) {
            updateWmNews(wmNews, (short) 2, "当前文章存在违规内容" + map);
            flag = false;
        }

        return flag;
    }

    /**
     * 保存app端相关文章数据
     * @param wmNews
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {
        ArticleDTO dto = new ArticleDTO();
        BeanUtil.copyProperties(wmNews, dto);

        // 文章的布局
        dto.setLayout(wmNews.getType());
        // 频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if(wmChannel != null) {
            dto.setChannelName(wmChannel.getName());
        }
        // 作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if(wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }
        // 设置文章id
        if(wmNews.getArticleId() != null) {
            dto.setId(wmNews.getArticleId());
        }
        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);
        return  responseResult;
    }

    /**
     * 审核图片
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImagesScan(List<String> images, WmNews wmNews) {
        boolean flag = true;

        if(images == null || images.size() == 0) {
            return flag;
        }
        //下载图片minio
        // 图片去重
        images = images.stream().distinct().collect(Collectors.toList());

        List<byte[]> imageList = new ArrayList<>();

        try {
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);

                //图片识别文字审核---begin-

                //从byte[]转换为butteredImage
                ByteArrayInputStream in = new ByteArrayInputStream(bytes);
                BufferedImage imageFile = ImageIO.read(in);
                //识别图片的文字
                String result = tess4jClient.doOCR(imageFile);
                //审核是否包含自管理的敏感词
                boolean isSensitiveScan = handleSensitiveScan(result, wmNews);
                if(!isSensitiveScan) return isSensitiveScan;

                //图片识别文字审核---end
                imageList.add(bytes);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 审核图片
        try {
            Map map = greenImageScan.imageScan(imageList);
            if(map != null) {
                // 审核失败
                if(map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章存在违规内容");
                }

                // 不确定信息，需要人工审核
                if(map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 审核纯文本内容
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextScan(String content, WmNews wmNews) {

        boolean flag = true;

        if((wmNews.getTitle() + "-" + content).isEmpty()) {
            return flag;
        }

        try {
            Map map = greenTextScan.greeTextScan(content);
            if(map != null) {
                // 审核失败
                if(map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章存在违规内容");
                }

                // 不确定信息，需要人工审核
                if(map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    /**
     * 1.从自媒体文章中提取纯文本内容和图片
     * 2.提取文章的封面图片
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {
        // 存储纯文本内容
        StringBuilder stringBuilder = new StringBuilder();
        // 存储图片
        List<String> images = new ArrayList<>();

        //1.从自媒体文章中提取纯文本内容和图片
        List<Map> maps = JSON.parseArray(wmNews.getContent(), Map.class);
        for (Map map : maps) {
            if(map.get("type").equals("text")) {
                stringBuilder.append(map.get("value"));
            }
            if(map.get("type").equals("image")) {
                images.add((String) map.get("value"));
            }
        }

        // 2.提取文章的封面图片
        if(StringUtils.isNoneBlank(wmNews.getImages())) {
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }

        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);
        return resultMap;
    }
}
